Apparatus and method for coating piles



F. W. CAMP.

APPARATUS AND METHOD FOR COATING PlLES.

APPLICAUON FILED FEB.21,1921.

3 9469970 mummy. 28,1922.

2 SHEETS-SHl-.E'I l.

P. w. CAMP. APPARATUS AND METHOD FOR COATING PILES.

s mz M, H n www M www EM @a L. V r M mw .m2 n m Patented Nov. 28, 1922..

STTES lui-@rhrt FRANK W. CAMP, OF SAN FRANCSCG, CALIFORNIA.

APPARATUS AND METHOD FOR GOATING PILES.

.Application rfiled February 21, 1921. Serial No, 446,662.

for Coating' Piles, of `which the following,`

`is a specification.7

My invention has for itsobject the application of a coating of `concrete or the like around a submerged pile, for the purpose of protecting` the `same from the ravages of the teredo, or other marine deterioration,

and also for reinforcing'the strength of the pile or creating a concrete cylinder in place of and around the axis of the pile as asubstitute supporting member `where the pile strength has been greatly or entirely lost.

Reference is herein made to my copending;

applications, Serials 356,966and 356,967, rel

spectively.y and which applications were filed with the Commissioner of Pat-ents on Feb.` 7. 1920, wherein I have set forth other apparatus and method for coating piles.

My present invention has for its particular object means and method of applying, usingand removing a mold form concentric f about the axis of a pile or the like to `be i form in place around a pile and showing the coated whereby the said form may be quickly and easily detached from the concrete or other molded material after the latter has set, and this is ,accomplished-by the disconnection of certain fastenings and the raising of the mold form in an upward direction as by cables, and coincident with which movement the sectionalized expansible diaphragm in the bottom mold form bites into or pivots on the surface of the pile, the individual leaves of the said diaphragm acting at such times as compression struts to force outward the lower portion of the mold form and which said lower portion carries with it the several longitudinal members, one or more` sections of which depending upon the boltinp; in longitudinal alignment and undersaid Vstrut action, are stripped freely from the surface of the moldedv concrete. In tliis'way the bottom sections of my mold are more `easily and freely removed than heretofore,

whereby I am enabled to more easily and economically apply a coating' of concrete to a pile and to a considerable depth.

Other objects will appear from the speciiications Vand drawings as follows:

, Figure 1 is a sectionalview ofl my mold concrete material, sand gasket and expansible diaphragm bottom,

Fig. 2 is a plan view of Fig. 1.

Fig. 3 is similar to Fig. 1, with the mold form in the act of being removed from the completed coating.` f j Fig'. f1 is an enlarged detail of one `of the expansible diaphragm compression struts and canvas covering` therefor.v

Figzishows in detail the manner of assembling the diaphragm struts about one of the segments of a mold section. v

F ig. 6 is a side view of Fig. 1 with the assembled mold form in place about the pile showing the means and manner of fastening and unfastening along,1 the' linesy of separation of the. form after the setting' of the concrete coating and while assembled thereabout. i i

Fig. 7 is a section onthe lineiVH VH of Fir. 3.

Throughout the figures similarnumerals refer to identical parts.

A complete mold form is shown in section `in Fig'. 1 whose principal parts comprise a plurality of sections, each section in turn comprisinga plurality of 4half sections or segments, thus vin the'iin'ure 7, `9 and 11, 13 and 15, 17 are each half sections or segments; 7, 9 forming one section; 11, 1.3form- 'ing a second section, and15,` 17 a third sec-,

tion, in! this case the bottom section. j

. A pile to becoated is shown by the numeral 1 the concrete coating; to` be applied ktherea-bout `is indicated by the numeral2; the water surface is shown at 3 and the mud line at 1. It is essential-to carry the coating- 2 below the mud line a to properly protect the pile against ravages` of the teredo, :and for this purpose theexcavation around the pile and below the mudline as at 6 may bel accomplished by vwater jets as set forth in my copending applications above referred to. The mold form consistsof a plurality of segments 7,9, and 11,13, 111 and 15, 16, 17,18 andas many more, asmay bel required which are `assembled about they, pile` 1, leaving a'concentric space to'be filledwith a concrete mixture V2. The several segments 7, 11, 15 andk 8, 12,16 and 9, 13^ 17-and 10, 14, 18 are assembled respectively in alignment so that the` vertical joints are continuous' throughout the plurality of sections; thatis, theentire moldfform may;beseparated along the vertical. joints` as 19, 20,

.,Fig-f2, 'and maybe `hinged outward` onthe l "clearly in Figs. 4 and 5.

vertical lines 21, 22 and away from the completed coating, and when the joint fastenings 32, 33 are released the entire form may be swungl away from. the completed coating as shown in Figs. 3 and 7.

In the lowermost sections 15, 16, 17 and 18 I provide an eXpansible diaphragm consisting of a plurality of finger members i which may be tapered or pointed if desired and which bridge the space from the mold sections 15, 16, 1,7, 1S, to the pile 1. These are made of relatively heavy metal so as to resist the strains due to the weight of the concrete, which strains occur `when the form is being stressed by the upward pull of the cables 24 and 25 and whereby the .form is pushed away from the concrete 21 after the latter has set. These finger pieces arebent over as at 27, Figs. 1, 3, 4, for the purpose of keeping the body of the fingers entirely 'free from the pile surface and to i;irovide an end which is formed to bite into the pile when the cable l24 is pulled up, as in Fig. 3.

At 28 is shown a kcovering for the finger members which I prefer to forni of canvas, green cow hide or the like to provide a suitable bottom on which the sand gasket 29, consisting of gravel the size of a pea or sand or the like on which the concrete mixture is deposited, and which prevents the leakage of the said concrete mixture out` of the form and at the same time lenables the bottom Amembers of the form yand diaphragm to separate freely from the pile on a clean line of cleavage 30 which line is the bottom of the final finished concrete covering 2.

As the form is drawn upward and` outwardby' the cables 24 and 25, the expansible diaphragm formed of the supporting strut members 23 and the canvas covering 28 collapses around the bottom and remaining in contact with the rpile until the form has sprung voutward as in Fig. 7 a sufficient amount to allow the fingers 23 to drop downward into the dotted position 31J Fig. 3, when the sand gasket 29 will empty freely `from the moldv form and the entire apparatus may be drawn or float to the surface and be ready for reassembling` and for further use about another pile.

` rlhe manner of attaching the finger members 23 to the form sections is indicated A reinforcing ange 40 similar to the flanges 35 and 36 is formed as a band segment around the section member 15 and is secured thereto by the eyebolts and nuts 41. A pintle 42 curved concentric with the segment 15 is then passed through the eyes of the said bolts and also through the eye 43'of the finger members 23. y 1

` To form the eye 43 I bend or twist the body ofthe member 23 at right angles and on each side thereof and over the pintle and between the adjacent eyebolts slip the bushings 44, 44. By this construction the finger members are free for the requisite lateral movement to enable them to adapt themselves to the irregularities of the pile.

`When the form is iirst assembled about the pile a series of Apins indicated at 32, 33, Fig. 2 are joined together by cables or chains as indicated in my copending application so that by withdrawing the chains of these two groups of vertical aligned pins the vertical joints 19, 2O of the entire assembled form are freed from restraint; the several sections, however, remaining in vertical assembly with each other and securely held together by the bolts as 34, flanges' and 3G. The horizontal jointing of the mold form as on the line 38 Figi 1 is for the purpose of facilitating the assembly of the' mold' above the water line 3, itbeing understood that sections 15, 16, 17, 18k with the expansible diaphragm and canvas covering are first assembled above the water line and retained in circular assembly by the pins as 32, 33 and thereafter segments 11, 12, 13,14 are superimposed thereon, the flange 35 forming a dovetail alignment at 38 and the flanges 35, 36 being bolted together by a series of holding bolts 34; and thereafter in similar manner segments 7, 8, v9, 10 are superimposed thereon and assembled and'similar segments are built up Vand coincident there.- with the mold form is lowered to a position below the mud line 4 but with its top eX- tending above the water line 3. Concrete mixture 2 is fedA into the mold form as it is built lup and being lowered so that at all times the concrete mixture within the mold form extends above the water ysurface 3. In this way an internal pressure is at all times maintained in excess of theexternal pressure so that there is no tendency `for a seepage of sea water through the expansible diaphragm, the sand'gasket l29 or joints of the segments and 'sections `and the concrete within the form hardens in perfect condition, leaving` finished coating on the pile as indicated at 2 in Fig. 3. f

I claim:

1. Apparatus for applying a concrete coating to piles comprising a plurality of sections constituting a mold form, holding means for said form, a bottom diaphragm consisting of a plurality of radially disposed members pivotallv joined to the lower end of said form, said members being of such length as to contact with and to form an acute angle with said pile, the contacting ends `of said members being bent inward toward said pile whereby they embed themselves in said pile and form a fulcrum to cause the mold sections to swing outward when said sections are lifted, means whereby said holding means vmay be released from above, and cables for lowering and lraising -said form.'

2. Apparatus as set forth in claim l and a cover of flexible material extending over the diaphragm.

Apparatus as set forth in claim l. and a cover of flexible material extending over the diaphragm and adapted to Contact entirely around the periphery of the pile.

Il. Apparatus as set forth in claim 1 and a cover of flexible material extending over the diaphragm and adapted to Contact entirely around the periphery oi the pile and said cover secured to the mold form.`

5. Apparatus as set forth in claim l wherein the said sections comprise a plurality of segments in axial alignment whereby the form may be parted longitudinall 6. Apparatus as set forth in claim 2 and a sand gasket on top of said cover.

7. Apparatus -as setl forth in claim Il` wherein the said sections comprise a plurality of segments in axial alignment whereby the form may be parted longitudinally.

8. Apparatus as set forth in claim 7 wherein the Said sections comprise a plu` rality of segments in axial alignment whereby the form may be parted longitudinally. FRANK W. CAMP. 

